Shuttle tension and take-up device



April 16, 1935. P SPENCER 1,998,26Q

SHUTTLE TENSION AND TAKE-UP DEVICE Filed Dec. 22, 1932 Q 2 Sheets-Sheet 1 a M 2. z

w I p 19kg? L. 29%.?"

K57 M -WWRS April 15,1935. I V 1,998,260

SHUTTLE TENSION AND TAKE-UP DEVICE Filed De 22, 1932 2 Sheets-Sheet 2 m z V J 3 g2 g3 24- 17 shuttle space for itsinstallation, and which is Patented Apr. 16, 1935 a n STATES.

e SHUTTLE TENSIONAND TAKE-UP DEVICE f Philip L. Spencer, 'MillbulhiMassg assignor to Watson-Williams Manufacturing Company;

' Millbury',Mass,acorporation of Massachusetts 1 Application mast 22.1932.- Serial-No. 648,457

This invention relates to'selfethreadingshuttles such as are used in automatic weft replenishing looms. It is desirable,;-particularlywhen using very fine weft-such as silk or rayon, that provision be made inthe' shuttle for taking up slack in the weft during the weaving operation, as well as for applying tension thereto. x r Y It is thegeneral object of my present inven: tion to provide. an improved tension and take-up device for a self-threading shuttle, scr -designed that it may be easily and economically manufac tured and that it will be exceptionally reliable when in use. v I

A further object is to provide a tension and take-up device which doesnot require increased preferably mounted in-a rear portion of the threading blockitself. 1 I I My invention furtherrelatesto arrangements and combinationsof parts which will be hereinafter described and more particularly pointedout inthe appended claims. v a A preferred form of the invention, is shown in the drawings. in which r Fig. 1 is a plan View of a portion of. a shuttle embodying my improvements; T Fig. 2 is a side elevation thereof; r I I r v Fig. 3 is an enlarged. sectional'side elevation, taken along the line 3-3 inFigvl; I I

Fig. 4:. is a transverse sectional elevatiomtaken along the line 44i'n.Fig.:3; Y Fig. 5 is an end view of my improved tension and take-upmember;

Fig. 6 is a side elevation thereof; Fig. '7 is an enlarged sectional plan view, taken along the line 7- -1. in Fig- 3;v J

Fig. 8 is a sectional side elevation similar to J Fig. 3 but showing the parts-in different positions;

Fig. 9 is a partial plan view showing a slight modification, and i Fig. 10 is an end view looki the arrow It in Fig. 9. I h g Referring to the drawings, I havev shown portions of a shuttle S andbobbin B, the bobbin having weft W wound thereon. The front porrespect forms no part of my present invention.

As shown in the drawings, the block I I comprises a horn l3 projecting inwardly and downwardly in the recess 22, 1

g in the direction of 4 below an overlapping guide flange l4. The'parts l3 and are spaced apartvto' provide a passage l5 (Fig-.2) through which the weft W is threaded.

'l'he usual steel or porcelain guide-pins l l, l8 and i9 (Fig. '7) are provided along the-outlet-pass- PATENT ori ice 1 age t2 to take the wear of the rapidly moving wejt W as it is drawn out of the shuttle.-

The block II is also provided with a vertical slot or opening 29 (Figs. 1 and '7) through which 3! and 32 (Fig. 5). The portions 3| and-32 are spaced apart lengthwise of the member 30,as indicated in Fig. 6, to provide a threading space oropening 33. The lower edge of-the member 3'! is curved inward;.asindicatedat 35, to provide a lhook-like portion eifective to prevent: une nsi;

A pivotal bearing portion 37 is formed on the outside of the tubular member 30, preferablyby reverselybending' a portion of thesheet metal as clearlyindicated-in Fig. 6.- The bearing per;-

tion 31 is,s1otted. at. an intermediate. point,,-as

indicated at 38 in Fig. 5, for apurposeto be de.- scribed.

.The tension and take -up mernber 30 1 s mounted in the-shuttle opening or recess 22 by inserting a pin 49 through the side walls of the recess and through the bearing portion 31 themember 30 being-thus mounted-for free pivotal movement A tension elementjlif, shown as. 5 portion of a rubber band, has one end brought-around tothe back of themember 38 as clearly shown inFig,

4,).flsaid'endbeing then threaded downward through the slotted opening. 38 andbeing knotted as indicated at 43.

and rearward-through aside opening 44- ;(Figs 4 and. 7.)] in the threading block. i and thenceinto aside opening 45 (Fig. 7) in' the body of the shuttle S, at which point the end of the band 42 is threaded through a transverse opening 46 in a tension screw 41.

The end of the band 42 is knotted at 48 to prevent withdrawal, and the yielding tension on the member 39 adjusted by turning the screw 41,

" The other end of the band 42,extends outward 'k interior space of the tubular tension and take-up,

member 39.

During this threading operation, the member is tipped forward from the uprightposition shown in Fig. 3 to the inclined position shown in dotted lines in Fig. 8. As the threading of the shuttle is thereafter completed, the. weft moves to a lower position in the shuttle, as indicated in Fig. 8. When the weft is under tension in this normal lowered position, the weft moves the member 30 substantially to the horizontal position indicated in full lines'in Fig. 8. The weft W in all positions bears against the flat rear side of the member 30, the upper edge of which may be rounded'or beveled to prevent chaffing a fine weft thread.

l The member 36 thus applies a light but continu-.

' ous tension to the weft W and, as soon as any slackness' of weft occurs, the tension and take-up n member 30 swings upward to take up the slack,

the member moving to the inclined position shown in dotted lines inFig. 8 or even to the upright position indicated in Fig. 3. g

In Figs. 9 and 10 I have shown a slightly modified construction in which the tension and take-upmember 5B is pivoted in a casing or support 5| which is secured in an open-end groove or recess 52 in the rear portion of the threading block. Cross pins 53 may be used to secure the casing 5! in position in the recess 52. The rear wall of the casing 5| takes the place of the rear partition member 23 previously described and is provided with a slot 54 and thread opening 55 for guiding the thread to the tension and take-up member 50. The operation of this modified construction is exactly the same as in the form previously described, and the modified construction possesses certain advantages in manufacture.

' I have thus provided a take-up and tension device conveniently mounted within the body of the threading block itself and so constructed that simple and comprises a single movable part only,

which part may be conveniently formed from a single piece of suitable sheet metal.

Having thus described my invention and "the advantages thereof, I do not wish to be limited tothe details herein disclosed, otherwise than V as set forth in the claims, but what I claim is:

1. In a loom shuttle, a tension'and take-up device comprising a member mounted on a transverse horizontal axis in said shuttle adjacent the shuttle-eye, and means to yieldingly movev said member toward upright position in the path of the weft, said member being displaceable therefrom by weft tension and being substantially tubular with side portions spaced apart to provide a longitudinal threading opening and with the inner edge of one side portion inwardly offset to provide a hook-like projection effective to prevent unthreading.

2. In a loom shuttle, a threading block having a longitudinally extended recess therein, and a tension and take-up device comprising a member pivotally mounted in said recess on a transverse horizontal axis, and means to yieldingly swing said member rearward and upward to substantiallyupright position in the path of the weft, said member comprising a single piece of sheet metal bentto provideatubular threadguiding'portlon and an extended and substantially-continuous thread-engaging surface.

3. Ina loom shuttle, a threading block having a longitudinally'extended recess therein, a casing secured in said recess, a tension and take-up member mount'ed'on a transverse horizontal axis in said casing, and means to yieldingly swing said member rearward and upward to substantially upright position in the path of the weft, said'member being displaceable forwardly and downwardly to substantially horizontal position by weft tension thereon; and said casing having a rear end wall provided with an entrance slot and a thread opening.

4. In a loom shuttle, a tension and take-up device comprising a member mounted on a transverse horizontal axis in said shuttle adjacent the shuttle-eye, and means to yieldingly move said member toward upright position in the path of the weft, said'member being displaceable therefrom by weft tension thereon and providing a substantially tubular guide for the thread with a longitudinal threading opening in one wall portion thereof and with an extended and continuous thread-engaging surface. 7

5. In a loom shuttle, a tension and take-up device comprising, a member mounted on a transverse horizontal axis in said shuttle adjacent the shuttle-eye, and means to yieldingly move said member toward, upright position in the path of the weft, said member being yieldingly displaceable downwardly and forwardly from such position by weft tension thereon, said member constituting a substantially tubular guide for the thread with side portions of said tubular member spaced apart to provide a longitudinal threadsaid member being displaceable forwardly and downwardly to substantially horizontal position by weft tension thereon. PHILIP L. SPENCER. 

